EP0289982B1 - Einrichtung zum Trocknen von Gegenständen in Reinigungsanlagen - Google Patents

Einrichtung zum Trocknen von Gegenständen in Reinigungsanlagen Download PDF

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Publication number
EP0289982B1
EP0289982B1 EP88107042A EP88107042A EP0289982B1 EP 0289982 B1 EP0289982 B1 EP 0289982B1 EP 88107042 A EP88107042 A EP 88107042A EP 88107042 A EP88107042 A EP 88107042A EP 0289982 B1 EP0289982 B1 EP 0289982B1
Authority
EP
European Patent Office
Prior art keywords
cleaning
drying
valve
cleaning fluid
stock
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88107042A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0289982A3 (en
EP0289982A2 (de
Inventor
Jürgen Höckh
Franz Koppelhuber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hockh Metall-Reinigungs-Anlagen GmbH
Original Assignee
Hockh Metall-Reinigungs-Anlagen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hockh Metall-Reinigungs-Anlagen GmbH filed Critical Hockh Metall-Reinigungs-Anlagen GmbH
Priority to AT88107042T priority Critical patent/ATE103015T1/de
Publication of EP0289982A2 publication Critical patent/EP0289982A2/de
Publication of EP0289982A3 publication Critical patent/EP0289982A3/de
Application granted granted Critical
Publication of EP0289982B1 publication Critical patent/EP0289982B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
    • C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
    • C23G5/04—Apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D12/00—Displacing liquid, e.g. from wet solids or from dispersions of liquids or from solids in liquids, by means of another liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material

Definitions

  • the invention relates to a device for drying objects in cleaning and / or degreasing systems according to the preamble of claim 1.
  • a gas-tight device which consists of a tube from which moist gas is drawn off with evacuating agents and which dries continuously supplied parts.
  • a reduced pressure is permanently maintained inside the tube and also within the chamber surrounding the tube.
  • evacuation means are thus available, but they are not used to build up the vacuum, but only to extract the vapors.
  • the chamber is also not designed to build up a vacuum. Only the entire device itself is designed to be gas-tight, so that a connection is established between the tube and the housing chamber and solvent vapors are leaking out. These leaks create an air flow when attempting to build a vacuum, which nullifies the build-up of the vacuum.
  • the reduced pressure is achieved in that the air flow supplied is less than the extracted one.
  • a single-chamber method is known from EP-OS 0 087 055, the treatment chamber being charged and emptied and at the same time as Drying chamber is used.
  • the drying principle is based on the dilution of the supplied air to below the maximum workplace concentration, so that solvents can still get into the environment unhindered.
  • the washing tank is neither designed for a vacuum, nor is a vacuum pump used.
  • a hermetically sealable chamber is also known which is suitable for building a vacuum, but in which the vacuum is built up before washing and therefore not for drying.
  • the vacuum pump is not intended for drying there either.
  • a mechanical pump or a propellant pump is used to draw off solvent vapors from a prechamber upstream of the cleaning chamber.
  • this device is not used for drying, but only for reducing the vapors escaping into the atmosphere and their recovery.
  • the object of the invention is to develop a device according to the preamble of claim 1 in such a way that the laundry can be dried more quickly and intensively, and the load on the workrooms and the environment can thereby be minimized.
  • drying can be significantly intensified by adding atmospheric air and maintaining the vacuum, the relative atmospheric humidity of the air supplied generally being below the saturation limit. This increases the absorption capacity of the air in the cleaning chamber, which means that a sufficient degree of dryness can be achieved with a relatively short amount of time, especially for objects with 'interior spaces' that are difficult to access.
  • the optimal addition amount can be empirically adapted to the laundry to be dried.
  • the time required for drying can be further reduced by additionally heating the air supplied as it is fed in. While e.g. the air at 20 ° C can only absorb 150 g PER / m3 when using perchlorethylene (PER), a supply air heated to 121 ° C can absorb 5.15 kg PER / m3. As a result, the solvent concentration after drying in the washing basket can be reduced from 14,000 ppm to 10 ppm PER.
  • the air supplied as it is fed in While e.g. the air at 20 ° C can only absorb 150 g PER / m3 when using perchlorethylene (PER), a supply air heated to 121 ° C can absorb 5.15 kg PER / m3.
  • the solvent concentration after drying in the washing basket can be reduced from 14,000 ppm to 10 ppm PER.
  • the washed-off parts retained in the strainer basket insert can also be subjected to the drying process. Especially before removing the strainer basket, the solvent concentrations at the workplace and the solvent residues that get into the environment can be reduced.
  • the only figure shows the device shown schematically.
  • the objects to be dried for example mechanically processed workpieces such as turned and stamped parts, are referred to below as laundry.
  • a storage container (not shown in the drawing) for the cleaning agent and a washing container 11.
  • filters in particular fine filters, for collecting solid parts and often also a distillation system for the regeneration of the cleaning liquid.
  • the cleaning liquid circuit is driven by means of a pump 27 and can be controlled by means of three-way valves 26, 31, which are arranged in the circuit upstream or downstream of the pump 27.
  • a spray tube 48 is arranged in the washing container 11, which can be sealed with a lid 11a and is designed for building up a vacuum and comprises a cleaning chamber 10.
  • the nozzles open out via a laundry basket 16 which can be moved by means of a rotary or rocking drive 12 and in which the laundry is accommodated.
  • the laundry basket 16 forms with the lid 11a and the rotary or rocking drive 12 a structural unit which can be lifted off from the washing container 11 forming the cleaning chamber 10 or placed on this washing container 11.
  • the washing container 11 is connected via a closure valve 14 to a collecting container 15, which is also designed for building up a vacuum.
  • a strainer basket insert 24 is arranged in the collecting container 15 in such a way that the cleaning liquid flowing out of the cleaning chamber 10 into the collecting container 15 reaches the strainer basket insert 24 from above, where the majority of the solid dirt particles are started.
  • Level monitors 25, 25a in the collecting container 15 prevent overfilling as well as unwanted emptying of the collecting container.
  • the check valve 28 arranged in the circuit between the pump 27 and the three-way valve located behind it serves for maintenance purposes. Branches of the circuit each lead to a cleaning liquid tank via a shut-off valve 29 or 30 and enable the cleaning circuit to be emptied or filled.
  • the cleaning chamber 10 can be connected to the detergent storage container of the detergent circuit via a ventilation line 47 and to the atmosphere via a ventilation line 49.
  • the ventilation line 49 can be connected via a valve 52a to an air supply which can be controlled via a throttle valve 53.
  • a heat source 55 can be used to heat the supply air via a heat exchanger 54.
  • a branch line 47a connects the vent line 47 to the collecting container 15.
  • the collecting container 15 can also be heated if necessary when the valve 52a is closed and the valve 52 is open Air are supplied.
  • the strainer basket insert 24 in the collecting container 15 can be moved horizontally (to the left in the drawing) and vertically moved out of it via an opening which can be closed by means of a cover 15a.
  • a propellant pump 34 is used as the vacuum pump.
  • the closable cleaning chamber 10 is connected to the suction nozzle of the propellant pump (jet pump 34) via a suction line 51 with a shutoff valve 56.
  • the jet pump lies in a propellant circuit and is fed with the aid of a circulating pump 33 via a propellant line 50 from a propellant reservoir 32.
  • a cooling device 35, 37 is provided for cooling the propellant 13 'in the propellant reservoir 32. This enables the blowing agent to be cooled to near its solidification point, which is around -20 ° C when using tetrachlorethylene and a maximum of 2 ° C when using water containing detergents.
  • a cooling unit 35 operating according to the compression method is used as the cooling device 35, 37.
  • the evaporator of this refrigeration unit 35 designed as a heat exchanger 37, is arranged in the propellant reservoir 32 within the propellant 13 '.
  • the compressor of the refrigeration unit 35 lies outside the propellant reservoir 32, as can be seen in the drawing.
  • the closed propellant reservoir 32 can be connected to the atmosphere via a vent line 36. It is also connected via a condensate return line 45 to the collecting container 15 arranged at a low level.
  • the suction strength of the jet pump 34 can be controlled with the aid of a throttle valve 41 provided in the propellant circuit.
  • the propellant reservoir 32 provided with level monitor 25, 25a is at approximately atmospheric pressure.
  • the cleaning liquid or Weisser is generally used as the blowing agent.
  • the facility works as follows: When the cleaning and / or degreasing system is in operation, there are temporal phases in which the items to be moved into the cleaning chamber 10 with the aid of the items to be washed 16 are washed or degreased and these items are then dried.
  • the cleaning liquid passes via line 46 from the reservoir of the cleaning liquid circuit via the open three-way valve 26 and the driving pump 27 via the open shut-off valve 48 to the three-way valve 31 and from there via line 46a to the spray tube 48 the washing chamber 10.
  • the laundry in the laundry basket 16 is flushed with cleaning liquid, the closed cleaning chamber 10 filling up.
  • the laundry comes under the rising liquid level in the container 11.
  • the washing process is supported by the rotating or rocking movement of the laundry basket, which is caused by the rotating or rocking drive 12.
  • the supply of further cleaning agents is stopped.
  • the displaced air can escape via the vent line 47 with the vent valve 44 open.
  • the cleaning liquid 13 is emptied into the collecting container 15 via the open closure valve 14. From there it can be conveyed via the three-way valve 26, the pump 27 and the three-way valve 31 into a line leading to the reservoir of the cleaning liquid circuit.
  • the closed cleaning chamber 10 which is emptied of the cleaning liquid 13, is connected via the suction line 51 to the jet pump 34 in order to generate a vacuum.
  • the propellant circuit is put into operation when the refrigeration unit is working, thereby producing an intensive gas flow saturated with the vapors of the cleaning liquid from the washing chamber 10 to the jet pump 34 in the suction line 51, where this gas flow onto the propellant 13 'cooled down to near the solidification point. hits which one corresponds to the cleaning liquid. Due to the constant introduction of the condensate into the propellant reservoir 32, the propellant level rises to a level determined by the condensate return 45. In addition, the level of propellant in the propellant reservoir 32 is monitored by level monitors 42, 42a. After a long time, the result of drying by applying a vacuum alone can no longer be increased.
  • a valve 52a opens and supplies an amount of air empirically determined via a throttle valve 53 to the cleaning chamber 10 via the ventilation line 49.
  • the supplied air can be heated if necessary from a heat source 55 via a heat exchanger 54.
  • a heat exchanger 54 By supplying this air into the cleaning chamber 10, further liquid is now absorbed, since the relative air humidity in the cleaning chamber 10 drops.
  • the pre-set vacuum is constantly maintained.
  • the valve 52a closes and the pressure in the cleaning chamber 10 is reduced via the valve 43.
  • the sieve basket insert 24 arranged in the collecting container 15 must be emptied from time to time.
  • the sieve residues are dried to prevent solvent residues from escaping into the air in the work area or into the environment.
  • the collecting container 15 can also be placed under vacuum after the liquid 13 has been drained off with the valve 57, 58 closed and the closure valve 14 open. If necessary, heated air is supplied with valve 52a closed and valve 52 open. After drying, any dust particles whirled up are conveyed back into the strainer basket insert 24 when the vacuum is broken down by the air supply via the ventilation line 49.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Drying Of Solid Materials (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
EP88107042A 1987-05-07 1988-05-03 Einrichtung zum Trocknen von Gegenständen in Reinigungsanlagen Expired - Lifetime EP0289982B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88107042T ATE103015T1 (de) 1987-05-07 1988-05-03 Einrichtung zum trocknen von gegenstaenden in reinigungsanlagen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3715168 1987-05-07
DE3715168A DE3715168C3 (de) 1987-05-07 1987-05-07 Einrichtung zum Trocknen von Gegenständen in Reinigungsanlagen

Publications (3)

Publication Number Publication Date
EP0289982A2 EP0289982A2 (de) 1988-11-09
EP0289982A3 EP0289982A3 (en) 1990-01-31
EP0289982B1 true EP0289982B1 (de) 1994-03-16

Family

ID=6326990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88107042A Expired - Lifetime EP0289982B1 (de) 1987-05-07 1988-05-03 Einrichtung zum Trocknen von Gegenständen in Reinigungsanlagen

Country Status (3)

Country Link
EP (1) EP0289982B1 (enExample)
AT (1) ATE103015T1 (enExample)
DE (2) DE3715168C3 (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6304313B1 (en) 1997-12-09 2001-10-16 Canon Kabushiki Kaisha Digital camera and document processing system using the digital camera

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5051135A (en) * 1989-01-30 1991-09-24 Kabushiki Kaisha Tiyoda Seisakusho Cleaning method using a solvent while preventing discharge of solvent vapors to the environment
US5180438A (en) * 1989-10-11 1993-01-19 Hockh Metall-Reinigungsanlagen Gmbh Cleaning and drying system
DE9013241U1 (de) * 1990-09-19 1990-11-22 Höckh, Jürgen, 7540 Neuenbürg Trockeneinrichtung in Reinigungsanlagen
JPH067750A (ja) * 1992-06-29 1994-01-18 Nippon Seiko Kk 減圧脱脂乾燥方法
GB2296556B (en) * 1992-06-29 1997-01-29 Nsk Ltd Method for degreasing-drying objects
IT1260831B (it) * 1992-07-17 1996-04-22 Procedimento di sgrassatura di pezzi meccanici ed impianto per effettuare il procedimento
DE4304495A1 (de) * 1993-02-15 1994-08-18 Duerr Gmbh & Co Verfahren und Reinigungsgerät zum industriellen Reinigen von Gegenständen
DE4326239C2 (de) * 1993-07-31 1997-06-05 Korsch Pressen Gmbh Tablettier-, Dragier- oder Granuliermaschine, insbesondere Rundlauf-Tablettenpresse
DE4328199C1 (de) * 1993-08-21 1994-10-13 Duerr Gmbh & Co Verfahren und Einrichtung zum Trocknen eines nach einer Bearbeitung mit einer Reinigungsflüssigkeit gereinigten Werkstücks
DE59908053D1 (de) * 1998-04-06 2004-01-29 Koerner Chemieanlagen Eingehauste Beizanlage
DE10321411B4 (de) * 2003-05-13 2005-12-01 Siedentop Gmbh Anlage und Verfahren zum Beizen von Gegenständen aus Stahl
GB2436331A (en) * 2006-03-24 2007-09-26 Mecwash Systems Ltd An aqueous washing system and method for engineering components.
GB2436453A (en) * 2006-03-24 2007-09-26 Mecwash Systems Ltd An aqueous washing system and method
DE102006039715A1 (de) 2006-08-24 2008-02-28 Dürr Ecoclean GmbH Reinigungsvorrichtung mit einer Flutkammer

Family Cites Families (12)

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GB1135181A (en) * 1964-09-18 1968-12-04 Ian Frederick Eyles Improvements in or relating to de-greasing of articles
US3610260A (en) * 1969-03-28 1971-10-05 Detrex Chem Ind Degreasing apparatus and method
US4029517A (en) * 1976-03-01 1977-06-14 Autosonics Inc. Vapor degreasing system having a divider wall between upper and lower vapor zone portions
SE402935B (sv) * 1976-12-10 1978-07-24 Projectus Ind Produkter Ab Sett att medelst varmluft eller annan gas torka maskindetaljer samt anordning for genomforande av settet
DE2817435A1 (de) * 1978-04-21 1979-10-31 Cleamax Ltd Verfahren und vorrichtung zur oberflaechenbehandlung von gegenstaenden
DE3038493C1 (de) * 1980-10-11 1982-02-11 Arthur Pfeiffer Vakuumtechnik Wetzlar Gmbh, 6334 Asslar Anlage zum Aufheizen und Trocknen von Teilen unter Vakuum durch Dampfkondensation und Abscheiden einer zweiten hoeher siedenden Fluessigkeit
DE3205736A1 (de) * 1982-02-18 1983-08-25 Langbein-Pfanhauser Werke Ag, 4040 Neuss Verfahren fuer die loesungsmittelbehandlung von insbesondere metallischem behandlungsgut
DE3319094A1 (de) * 1983-05-26 1984-11-29 Gebr. Schmid Maschinenfabrik GmbH & Co, 7290 Freudenstadt Verfahren und vorrichtung zur behandlung eines plattenfoermigen gegenstandes
DE3406296A1 (de) * 1984-02-22 1985-09-05 Stohrer-Doduco GmbH & Co, 7250 Leonberg Fluessigreinigungsanlage
DE3412007C2 (de) * 1984-03-31 1987-02-26 Dürr Gmbh Verfahren zur Reinigung von Werkstücken mittels eines flüssigen Lösemittels
DE3515887A1 (de) * 1985-05-03 1986-11-06 Karl Roll GmbH & Co, 7130 Mühlacker Vorrichtung zum reinigen von gegenstaenden mittels fluechtiger loesungsmittel
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6304313B1 (en) 1997-12-09 2001-10-16 Canon Kabushiki Kaisha Digital camera and document processing system using the digital camera

Also Published As

Publication number Publication date
EP0289982A3 (en) 1990-01-31
DE3888387D1 (de) 1994-04-21
EP0289982A2 (de) 1988-11-09
ATE103015T1 (de) 1994-04-15
DE3715168C3 (de) 1994-04-28
DE3715168A1 (de) 1988-12-01
DE3715168C2 (enExample) 1990-01-18

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